Concrete-mixer.



. H. REED, v

' CONCRETE MIXER. APPLICATION I'ILED FEB.1Q,,1'909. V v

' Patented Nov. 9, 1909;

2 SHEETS-SHEET 1.

M. H. REED.

CONCRETE MI ER."

APPLIUATION FILED I'EB.1Q, 1909 Patented N0v. 9, 190 9.

2 SHEETS-SHEET 2.-

MATTHEW, HOWARD REE onrr'rrssu ne, PENNSYLVA IA.

CONCRETE-MIXER.

Specification of Letters Patent.

Application.iited February 10, 1909. Serial No. 477,164.

To all whom it may concern:

Be it knownthat' I, MATTHEW HOWARD.

Rash, a citizen of the United States, residing at Pittsburg, in the county of, Allegheny and State of Pennsylvania, have invented certain, new and useful Improvements in Concrete Mixers, of which the following is a specification, reference being had therein to the companying .drawlng.

My inventionconslsts of an lmprovem'ent in concrete mixers and refers particularly to the mechanism forwactuating the charging blades or. the covering gate for the delivering chute."-

' The object of the invention is to provide means for operatingthe blades or gate and also for holding the blades in mixingor discharging position and for holding the gate open or closed andjproviding for operating either from either-end of the mixer drum,

by means of lever and springsmechanism, as

shall be more fully hereinafter described.

Referring to the'drawin s :Figure 1 is a view in front elevationo the" mixer drum and portions of 1ts supporting androtatin'g mechanism. F g. 2 is'aview of the drum from the back. Fig. 3 is a'horizontal section on the line III. III. of Fig. 1.- Fig. 4 is a vertical sectional View on theline IV. IV. of Fig. 1' partly-broken away. Figs. 5 and 6 are detail views showing modifications. ;F1g.

7 is a view similar to Fig. 1, but showing a modified construction of spring. Fig. 81s a view of Fig. 7 from the other end,"the levers being shown in both positions. Fig.9 is a vertical sectional view. on the line IX. IX. of Fig. 7 but showing the mixing blades thrown out to contact with thedrurn for discharging, and locatedat to and. bottom of the drum. Fig. 10 is a simi ar view showing the blades at-the samelocationsbut in the mixing position.

.In the drawings, 2 represents the drum of cylindrical form, having a rear annular receiving chamber 3 between a baclg annular flange 4 and a rear partition 5. Partition 5 is provided .with a centrally arranged inlet opening 6 and the shell between partition-5 and flange 4 has any suitable lifting. mecln anism, not shown, such as thoseshown in my with a centrally arranged outlet .opening" defined by the delivery chute Swhich in'the position shown in Fig. 1 slopes downwardly .Inay

Patented Nov. 9, 1969.

and opens into the interior or mixing compartment of the drum.

'The delivery chute is provided with a closing door or cover 10 entirely within the mixing chamber and immediately behind the front wall 7, mounted on a hinge rod 11 pivotally carried insuitable bearings in the front and back wall respectively. Rod 11 is provided, at the front with an operating lever 12 and at theback with a similar operating lever 13 secured in any suitable manner, and these levers are so located that whenjthe gate is thrown open, the levers will occupy the positions in dotted lines in Figs. 1 and 2, the rear lever 13 extendi'ng across the o Jening (3., By this construction the gate e operated by the lever at either end and the position of the rear lever will always indicate to the workman whether the gate is open'or closed. When open, the material will pass through the chute, and when closed will be deflected away therefrom to other For the purpose of positively holding thegate in either open or closed position, I

portions of'the mixer.

' downwardly'into the position shown in dotted lines for openingthe gate, the arc-shaped link 16 will reach around the end of shaft 11 without interference, as clearly shown.

The point of attachment of 'link 16 with lever .12,'is designed to pass beyond the dead center alinement with shaft. 11 sufficientlyfar to insure a pull of the spring on the other side to positively hold the gate raised, as-

will be readily understood, while the normal tension of the spring in the closed position of the gate, tends 'to maintain it closed. By

this construction it will be seen that the gate may be open or closed from either end by operating either lever 12 or 13, and will remain in either posit-ion against accid'ental shift or'niotion. I

" Ordinarily. the gate liesdown upon the .topedges of chute 8 as indicated in the principal figures of the drawings.

In Fig. 5: I have shown a construction in which the cover .10! fits with n the edge of chute 8 as shown, and rests upon an -inner charging position. In these figures,.19 is the Y maybe thrown open until the discharge the material which is 20 is the discharging blade at supporting ledge or flange 17 which may be conveniently made of angleshape and riveted to the inner side of the chute wall. v.

In Fig. 6 I illustrate the same construe tion and also a lateral supplemental chute :znd. securing bolts the range'of movement oradjustment of the'extension may be accurately limited-as desired. i The advantages of. the invention will be readily appreciated by all those familiar with this class of mechanism.

The opera-- tion will be readily understood, the mixing drum being rotated with the doorclosed uni.

til it is desired to discharge, whereupon'it been discharged into a barrow or other suitable receiving vessel, when the gate may be again closed and the drum re-filleda The location ofthe handle 13 at the front end so as to indicate the condition of the door is ofgreat advantage in addition to the facilityof operation from either end. 7

.Figs'.,7, 8, 9and 10 show a drum of similar construction but with a discharge arrangement consisting of a stationary chute, not revolying with the drum but dropped on it to the outside of .the drum, the material being all or partially lifted by the discharging blades when they are thrown into 'disdelivery chute,

7 preferably supported by timber 19 of a platform or other mounting. each side, mounted on shaft 21 with suitable bearings in mixer shell.

Shaft21 is provided with a lever 22at "the discharging end of the drum-and lever at charging end and with a band or leaf tension spring 24, preferably attached to lever 22 and to a suitable terminal attachment as av bolt 25 mounted in bracket 26,

with an adjusting nut to increase or decrease the tension. The spring 1 have sh6wn 1s an are shaped spring instead of the coil spriiig shown in Figs. land 2. This-spring willj iot become clogged byconcrete or material.

Other modifications offspring can be used .or a compression or pressure instead oflten-ision spring can be substitu'ted, but still be" within the scope of my lnvention moperating dischargmg gates or scribid and from either end It w ll be readily of my improvement blades as deof the mixer is partly automatic, in"

contents have 1 arranged toand its chute,

seen that the operation tension-again. For this reason it is not necessary to have experts to operate the mixer.

\Vhat 1 claim 1s l. A rotaryconcrete mixer drum provided in its interior with an adjustable material deflecting element having a limited range of movement, a rocking'shaft extending longitudinally of the drum carrying said element and having an operating lever, and spring mechanism connected with the drum and lever adapted to positively hold the lever, shaft and deflecting element when thrown to the limit of movement in either direction, substantially as set forth.

2. A rotary concrete mixer drum provided in its interior with an adjustable materialde fiecting element having limited range of movement, a rocking, shaft extending longitudinally of the drum carrying said element and having an operating lever, and spring 'inec-hanism connected with the drum having an arc-shaped terminal engaging the lever .and adapted to'positively hold it and the shaft and deflecting element when thrown to the limit of movement in either direction, 'substantially as set forth.

A rotary concrete mixer drum provided in its interior with an adjustable material deflecting elementhaving a limited range of movement, a rockingshaft extending longitudinally of the drum carrying said element and having an operating lever at each end, and spring mechanism connected with the drum and one of said levers adapted to positively hold the levers, shaft and deflecting element when thrown-to-the limit of movement in either direction, forth.

substantially as set '4. A rotary concrete mixer drum provided in its interior with an adjustable material; deflecting element having a limited range of movement, a rocking shaft extending longitudinally of the drum carrying said element and having an operating lever at its end, and

spring mechanismembodying an arc-shaped portion connected with said lever adapted to exert tension thereon to positively hold the lever, shaft and deflecting element when thrown to the limit of movement in either direction, substantially as set forth.

- 5. The combination with the mixing drum of a hinged chute cover and a support therefor and spring controlled means or holding'the hinged cover either open or closed. j

.6. The combination with the mixing drum and its chute, of a pivotally mounted cover for'th chute, on the chute, and spring controlled means for holding the cover either open or closed.

a supporting fledgc therefor 7 The combinationwith the mixing drum and its chute, ofa pivotally mountedcover for the chute, a supporting ledge therefor and a supplemental extensible side projecting from the chute, and springeofltrolledmeans .fqr holdingithe covereither. open or closed.

and its. chute, of a hinged chuteco ver'withinsaid-drum 'anda suppopt therefor; and spring controlled means for holding the. cover eithe f -vopenorclosed.

8; The combination with the mixing drum 9. a The combination with the miziing and its 'cl1ute ,.-of a,rocliifshaftfextndirig: longitudinally within the'druin, a support, 'ing'ledge Within-italic chute, and a material-L deflecting element mounted on the rocker.

shaft having a'resjtricted range of movement limited by the supporting ledge, substan- Y tially as set forth.

10. The combination with the mixing drum and its chute, ofa-=rocker shaft extending longitudinally 'within the drum, a sup- '11. The combination {with the mixing drum] and a chute thereinhaving a support- .ing ledge inside and below the edge of the chute, of a hinged chute cover having a lim- 'ited ange of movement adapted to bear upon said ledge, and spring-controlled means for holdin substantially asset forth.

' Intestimony whereof I aifix my signature in presence of two Witnesses.

l MATTHEW HOWARD REED.

' \Vitnesses FRANK LEESE,

JOSEPH SIMPSON.

the hinged cover open or closed, 

